[cli] Move typescript dependency to peer

[danielkcz]

With TS 3.7 the new syntax for optional chaining and nullish coalescing is added. Because cli depends on TS 2.9.2, it's not able to parse it. I think that moving TS as peer dependency is a safe option here. I did not dare to update in devDependencies, but it's unlikely it would break anything.

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[tricoder42]

Thank you @FredyC! I'm gonna release it tonight.

[arikaa]

Hello :) when is this going to be deployed to npm?

[crhayes]

@tricoder42 Any way this can be released? Thanks!

Also, is this something you'd be open to porting over to the 2.* release branch? Would be nice to be able to use the stable 2.* releases with these new Typescript 3.7 features.

[danielkcz]

@crhayes Uh, the master branch is 2.x, or I hope since I am still using that as well :) The next is for V3

[crhayes]

@FredyC Good to know, my bad!

[danielkcz]

@tricoder42 You haven't mentioned this PR in the release, is it included?

[tricoder42]

@tricoder42 Oh, yeah, it is! I missed that because it has different commit message format.

[tricoder42]

It has just been released in 2.9.0. ;)